CN107477471A - Light fixture based on scattered photon extraction - Google Patents

Light fixture based on scattered photon extraction Download PDF

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Publication number
CN107477471A
CN107477471A CN201710404000.1A CN201710404000A CN107477471A CN 107477471 A CN107477471 A CN 107477471A CN 201710404000 A CN201710404000 A CN 201710404000A CN 107477471 A CN107477471 A CN 107477471A
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CN
China
Prior art keywords
light
optical element
transformation
wave length
reflector
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Pending
Application number
CN201710404000.1A
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Chinese (zh)
Inventor
纳达拉贾·纳伦德兰
顾益民
让·保罗·弗雷西尼耶
朱依婷
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Rensselaer Polytechnic Institute
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Rensselaer Polytechnic Institute
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Publication of CN107477471A publication Critical patent/CN107477471A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/10—Construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • F21S8/033—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/06—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/10—Refractors for light sources comprising photoluminescent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • F21V7/26—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material the material comprising photoluminescent substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/87—Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Architecture (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The application provides a kind of light fixture, including：Radiator, the radiator have surface；Light source, the light source are connected to the surface and are arranged to launch light；Reflector, the reflector have the summit close to the surface, and the reflector is arranged to be spaced apart with the radiator, and are arranged to the light being reflected into and are just being upwardly away from the reflector；And material for transformation of wave length, the material for transformation of wave length is arranged to be spaced apart with the light source in said direction.

Description

Light fixture based on scattered photon extraction
It is that on March 11st, 2011, division submitting day are November 11, Application No. in 2015 applying date that the application, which is, The divisional application of the patent application of the 201510766192.1st, entitled " light fixture based on scattered photon extraction ".It is above-mentioned special It is on March 11st, 2011, Application No. 201180013506.0 (PCT/US2011/028069), invention the applying date that profit application, which is, The divisional application of the patent application of entitled " light fixture based on scattered photon extraction ".
The cross reference of related application
The application is the continuation application for the 12/947th, No. 899 U. S. application submitted on November 17th, 2010, the 12/th 947, No. 899 U. S. applications are the continuation applications for the 11/642nd, No. 089 U. S. application submitted on December 20th, 2006, the No. 11/642,089 U. S. application is entitled " the High Efficiency Light Source submitted on April 23rd, 2007 Using Solid-State Emitter And Down-Conversion Material (use solid-state light emitters and lower conversion The high efficiency light source of material) " No. 10/583,105 U. S. application (being now United States Patent (USP) 7,819,549) part continue Shen Please, the 10/583rd, No. 105 U. S. application is the PCT/US2005/015736 international applications submitted on May 5th, 2005 371 thenational phases, PCT/US2005/015736 International Application claims on May 5th, 2004 submit the 60/568th, The priority of No. 373 U.S. Provisional Applications and No. 60/636,123 U.S. Provisional Application submitting on December 15th, 2004 Priority.The application also requires the priority for No. 61/339,958 U.S. Provisional Application submitted on March 11st, 2010.Institute There is the disclosure that these are applied by quoting overall be herein incorporated.
Technical field
Present invention relates in general to solid-state illumination.In particular it relates to use solid-state illumination (SSL) light source, optics The lighting lamp with high effeciency of element, radiator and remote wavelength transition material.
Background technology
Solid-state illumination (SLL) light-emitting device including the solid state lamp with light emitting diode (LED) is extremely useful , because compared to conventional lamp, for example with incandescent lamp and the light fixture of fluorescent lamp, solid-state lighting luminaire potentially carries Lower manufacturing cost and the benefit of long-term durability are supplied.Due to the length of solid-state lighting luminaire operation (burning) when Between and low-power consumption, even if when their initial cost be more than conventional lights initial cost when, they also usually provide feature into This benefit.Because large-scale semiconductor fabrication can be used, it is possible to which many solid-states are produced with extremely low cost Illuminator.
Except the indicator lamp on such as family expenses and consumer appliances, audio-visual equipment, telecommunication apparatus and automotive instrument markings Using in addition, LED also obtains considerable application indoors or in terms of outdoor presentation of information.For example, LED can merge Into top illuminator or wall-mounted illuminator, and can be designed for aesthetic property demand.
With the development of transmitting blue light or the efficient LED of ultraviolet (UV) light, producing following LED has become feasible：It is described A part for the primary emission that LED passes through LED generates white light to the wavelength convert of longer wavelength.For by the way that primary is sent out The system that the non-conversion portion and the light of longer wavelength penetrated are combined to produce white light is as known in the art.Utilize Other selections that LED produces white light include mixing two or more color LEDs in different proportions.For example, in this area It is well known that produce white light by mixing red LED, green LED and blue led.Similarly, it is known that by mixing RBG LED and amber (RGBA) LED or hybrid RGB LED and white (RGBW) LED produces white light.
Nearest research has been found out：Overall light transmitting and bulb durability are reduced by the LED heat generated.More specifically Ground, when LED component is heated to the temperature more than 100 DEG C, it is lower that LED component just becomes efficiency, so as to cause visible spectrum Return decline.Lasting operation and the resulting exposure to high fever also reduce LED useful life.In addition, with Temperature increases to more than about 90 DEG C of threshold value, and the intrinsic wavelength conversion efficiency of some lower converting phosphors also drastically declines.
It is also well known that the light emission measure being directed towards in specific environment can be increased using reflecting surface in this area.Instead The face of penetrating is already used to invest the light from LED to material for transformation of wave length and/or generated for reflecting from material for transformation of wave length Lower conversion light.Even with these improvement, the present situation of this area LED technology is in the visible spectrum or efficiency is low. Single led light output is less than the light output of conventional lamp (for example with those light fixtures of incandescent lamp), conventional lamp is can See in spectrum about 10% validity.In order to realize the light output work(suitable with the existing lamp technology using incandescent lamp Rate density, LED component usually require bigger LED or the design with multiple LED.It has been found, however, that merge bigger LED or multiple LED design brings the challenge of its own, such as heating and capacity usage ratio.
The content of the invention
In order to meet the needs and other needs, and in view of its purpose, the invention provides a kind of light fixture, including： Radiator, radiator have surface；Light source, light source are connected to surface and are arranged to launch light；Reflector, reflection Utensil has the summit close to surface, and reflector is arranged to be spaced apart with radiator, and is arranged to light being reflected into Side is upwardly away from reflector；And material for transformation of wave length, material for transformation of wave length are arranged on direction and are spaced apart with light source.
In another embodiment, the invention provides a kind of light fixture, a kind of light fixture, including：Optical element, optical element It is made up of light transmissive material and there is first surface, second surface and the 3rd surface, wherein, first surface, second surface and Three surfaces are non-coplanar each other, and second surface and the 3rd surface are not parallel each other；Light source, light source are disposed in close to first surface But the position away from second surface and the 3rd surface；And material for transformation of wave length, material for transformation of wave length be formed at second surface and Without covering first surface on 3rd surface.
In another embodiment, the invention provides a kind of scattered photon to extract light fixture, including：Optical element, have the One surface and the side wall of at least one substantial transparent extended from first surface；, should for launching the light source of short wavelength radiation Light source is arranged in the end of the side wall of the above-mentioned at least one substantial transparent relative with the first surface of optical element；Ripple Long transition material, it is arranged on the first surface of optical element, for the short wavelength's spoke received and lower conversion is sent by light source That hits is at least some, and transmits the part in the radiation of received and lower conversion backward；And one or More reflectors, it is arranged to relative with material for transformation of wave length so that light source be disposed in wavelength material and reflector it Between, it is at least some in the radiation extracted for being reflected through above-mentioned at least one transparent side wall from optical element；Wherein, on The side wall for stating at least one substantial transparent is connected to the first surface comprising material for transformation of wave length at one end, and another End is connected to light source, and wherein, the side wall of above-mentioned substantial transparent is configured to：It will be transmitted backward from material for transformation of wave length Radiation be sent to the outside of light-emitting device.
The light fixture can also include material for transformation of wave length, its be arranged at least one or more of optical element other On wall, such as in one or more transparent side walls.Similarly, the light fixture can also include being attached to light source or be adjacent to light The radiator in source.In certain embodiments, radiator is attached to the side wall of at least one substantial transparent in side, and Opposite side is attached to one or more reflectors.For example, the light fixture of the present invention can be squash type or rotary luminous lamp Tool.The light fixture can also include one or more hitches, its for example for installation on wall (such as in wall-mounted type lamp In tool) or be installed on ceiling (such as in suspension type light fixture).Light source can be at least one semiconductor light-emitting-diode, Such as light emitting diode (LED), laser diode (LD) or resonant cavity light emitting diodes (RCLED).It is additionally or alternative Ground, light source can be the arrays for including more than one illuminator, such as LED array.Many different types of LED can be used As light source.For example, when array is used as into light source, array can include the one or more of identical or different type LED.Light source can be selected to improve efficiency, the quality of colour of light is launched in control, or for many other reasons, such as U.S. The property seen.Material for transformation of wave length can include one or more of materials, such as phosphor, quantum dot, quantum dot crystal and quantum Point nanocrystal and its mixture.
In another embodiment, the invention provides a kind of squash type scattered photon to extract light fixture, including：For launching The light source of short wavelength radiation, the light source include one or more illuminators；Surface with least one substantial transparent Elongated tubular optical element；Material for transformation of wave length, it is arranged at least one surface of optical element or and optical element At least one surface integrate, and away from light source, for receiving and lower changing the short wavelength's spoke launched by the light source That hits is at least some, and transmits the part in the radiation of received and lower conversion backward；And one or More reflectors, it is arranged to relative with material for transformation of wave length so that the light source be disposed in material for transformation of wave length with it is anti- It is at least some in the backward transmitting portions in radiation for reflecting received and lower conversion between beam；Its In, the light fixture is configured to：So that some radiation can be emitted as non-switched light radiation backward towards light source, some light can Pass through material for transformation of wave length transmission with not converted；And wherein, the light fixture is configured to：By light source, optical element and The conversion light for arranging to capture the essentially all of conversion light to front transfer and transmit backward of reflector.
In another embodiment, the invention provides a kind of scattered photon to extract light fixture, including：For launching short wavelength The light source of radiation, the light source include one or more illuminators for being attached to the first optical element；Material for transformation of wave length, its It is arranged on the second optical element or is integrated with the second optical element, is launched for reception and lower conversion by the light source It is at least some in the short wavelength radiation gone out, and for transmitting the one of received and through down conversion radiation backward Part；And reflecting surface, it is attached to the first optical element in side and wherein turned with being formed comprising the second optical element and wavelength The reflector of conversion materials, at least one in the backward transmitting portions in radiation for reflecting received and lower conversion A bit；Wherein, the second optical element and material for transformation of wave length are suspended in reflecting surface and away from light source.
In another embodiment, the invention provides a kind of scattered photon including multiple light-emitting lamps to extract lamp system. Each include in multiple light-emitting instruments：Optical element, it has first surface and at least one base from first surface extension Transparent side wall in sheet；For launching the light source of short wavelength radiation, the light source is arranged in relative with the first surface of optical element At least one substantial transparent side wall one end on；Material for transformation of wave length, it is arranged in the first surface of optical element On, for receive and short wavelength radiation that lower conversion is launched by the light source in it is at least some, and for transmitting institute backward A part in the radiation of conversion receive and lower；And one or more reflectors, it is arranged to turns with wavelength Conversion materials are relative so that the light source is disposed between material for transformation of wave length and reflector, for being reflected through at least one base It is at least some in the radiation that transparent side wall is extracted from optical element in sheet；Wherein, the side wall of at least one substantial transparent The first surface comprising material for transformation of wave length is connected at one end, and is connected to the light source in the other end, and wherein, base Transparent side wall is configured to the radiation transmitted being sent to the outside of light-emitting lamp backward from material for transformation of wave length in sheet.
In another embodiment, the present invention provides a kind of scattered photon extraction light fixture, including：Optical element, it has the One surface and one or more second surfaces, first surface have two relative edges, wherein, one or more Two plane tangents or be vertically connected to each edge of first surface；For launching one of short wavelength radiation or more Multiple illuminators, one or more illuminators are arranged on one or more second surfaces of optical element；Wavelength convert Material, it is arranged on the first surface of optical element, for the short wavelength radiation received and lower conversion is launched by illuminator In at least some, and the part into the radiation of received by front transfer and lower conversion；It is and one or more Individual reflector, it is arranged to relative with one or more illuminators so that material for transformation of wave length is disposed in one or more It is at least some into the radiation of front transfer for being reflected through optical element between multiple illuminators and reflector；Wherein, One or more second surfaces are each connected to the first surface comprising material for transformation of wave length at one end, and in the other end One or more reflectors are connected to, and wherein, one or more second surfaces are configured to：Will be from wavelength convert The radiation that material transmits backward is sent to the outside of light-emitting lamp.
In an embodiment of the present invention, material for transformation of wave length is arranged to away from light source.Use one or more wavelength Transition material come absorb in a spectral regions radiate and launch the radiation in another spectral regions, material for transformation of wave length can To be lower transition material or up-conversion.Multiple material for transformation of wave length can be by from the wavelength convert that light source is launched to identical Or different spectral regions.Material for transformation of wave length may be mixed together, or individual course can be used as to use.By under capture The transmitting portions forward of the light of conversion and backward both transmitting portions, can improve system effectiveness.Similarly, when using one Or more reflector when, the position of lower transition material and reflector can be adjusted to ensure that the light from light source is equably hit Lower transition material is hit, to produce uniform white light and so that more light leave device.Can using radiator come reduce and/ Or redistribute heat at light source.Meanwhile lower transition material is arranged remotely from into light source prevents light from feeding back in light source.Institute Further to make the heat minimum at light source, and cause light output and the life-span improved.Compared to the prior art, it is all These structural parameters and feature make it possible to increase light yield, enhancing illumination efficiency and improve capacity usage ratio.
Brief description of the drawings
When being read in conjunction with the figure described further below, the present invention is best understood from described further below.Require emphasis , according to common practice, without calibrating the various features of accompanying drawing.On the contrary, for the sake of clarity, it is arbitrarily enlarged Or reduce the size of various features.Accompanying drawing is included with figure below：
Fig. 1 is to use solid state light emitting diode (LED) and material for transformation of wave length according to exemplary embodiment of the invention To produce the diagram of the method for visible ray；
Fig. 2 (a) is the diagram of solid state light emitter light fixture according to an embodiment of the invention；
Fig. 2 (b) shows the profile of the solid state light emitter light fixture shown in Fig. 2；
Fig. 2 (c) illustrates the enlarged drawing for the Fig. 2 (b) for showing radiator and solid state light emitting diode (LED)；
Fig. 3 is the diagram of solid state light emitter light fixture according to another embodiment of the present invention；
Fig. 4 (a) to Fig. 4 (f) shows that the present invention's includes one or more light sources, material for transformation of wave length, radiator With the profile of the other embodiment of optical element；
Fig. 5 (a) to Fig. 5 (d) shows that one or more light sources, wavelength according to other embodiments of the invention turn The profile of the other embodiment of conversion materials, radiator and optical element；
Fig. 6 (a) to Fig. 6 (c) is according to other embodiments of the invention one or more when being combined with reflector Individual light source, material for transformation of wave length, the profile of radiator and optical element；
Fig. 7 (a) shows wall-mounted illuminator according to an embodiment of the invention；
Fig. 7 (b) shows Fig. 7's (a) being configured to hang on the ceiling according to another embodiment of the present invention Illuminator；
Fig. 7 (c) shows the profile of the illuminator shown in Fig. 7 (a) and Fig. 7 (b)；
Fig. 7 (d) illustrates the amplification for the Fig. 7 (c) for showing radiator, optical element and solid state light emitting diode (LED) Figure；
Fig. 8 (a) shows illuminator according to another embodiment of the present invention；
Fig. 8 (b) shows the profile of the illuminator according to an embodiment of the invention shown in Fig. 8 (a)；
Fig. 8 (c) show according to another embodiment of the present invention shown in Fig. 8 (a) and Fig. 8 (b) employ it is multiple Close the modification of the illuminator of reflector；
Fig. 9 (a) to Fig. 9 (b) illustrates the illumination system using multiple illuminators according to another embodiment of the present invention System；
Figure 10 (a) illustrates similar with the illuminator shown in Fig. 2 (a) but without reflector light fixture；And
Figure 10 (b) illustrates the result of ray tracing computer simulation, and it shows the illuminator shown in Figure 10 (a) Light output.
Embodiment
Although describe and illustrating the present invention with reference to specific embodiment herein, the present invention is not intended to limitation In shown details.More precisely, the model of the equivalent without departing from the scope of the present invention and in claim In enclosing, various modifications can be carried out in detail.
In the 7th, 750, No. 359 United States Patent (USP), the present inventor has discovered that material for transformation of wave length before Following purposes：Produce the wide bandwidth light with desired chromatic value and luminous efficacy, at the same increase colour rendering index (CRI) and The correlated colour temperature (CCT) of output light is reduced, so as to improve the efficiency of device.In No. 2010/144572 International Publication of WO In, the inventors found that and disclosing by being away from light source by material for transformation of wave length movement) and the benefit of acquisition Place.By being away from light source by material for transformation of wave length movement, more converted light can be extracted and light can be improved The effect of device.Using it is adjacent with light source and/or with the radiator that light source integrates, obtain additional benefit.It is this The method for producing light is described as scattered photon extraction (SPE) technology.It was found that SPE technologies increase light yield, radiating is improved, from And cause optical device durability and the life-span extended.The full content of these bibliography is incorporated herein by reference, wherein, These bibliography use replacement bulb of the SPE technologies as incandescent lamp in the bulb based on SSL.
The present inventor it has now been found that：Efficient illuminator and illuminator can be produced using SPE technologies. When compared with traditional light source, it has been found that apply for general illumination and had using the existing light fixture of light emitting diode (LED) chip There is lower luminous output.In order to overcome the defect, existing LED-based light fixture realizes object table using LED array Light level needed on face.Therefore, existing method also results in increase, higher energy consumption and the additional heat treatment of cost The shortcomings of problem.The illuminator of the present invention is using SPE technologies and optionally with the optics of structuring, the present invention Illuminator the transmitting of increased light can be produced using less LED and less electric energy.The illuminator of the present invention is also It potentially reducing manufacture and running cost.
By the present invention in that solving these problems with SPE technologies, light source is arranged in away from wavelength convert by SPE technologies The place of material.One or more optical elements can be arranged between light source and material for transformation of wave length.Furthermore it is possible to each Kind is configured to use radiator and reflector.Light source can be at least one semiconductor light-emitting-diode, such as light emitting diode (LED), laser diode (LD) or resonant cavity LED (RCLED).Embodiments of the invention can use single SSL sources (such as It is single led), or light source can be used as including multiple SSL sources (that is, multiple LED in array).As it is known in the art, Many different types of LED can be used as light source.For example, when array is used as into light source, the array can include identical Or different types of one or more LED.Light source can be selected to improve efficiency, the quality of colour of control transmitting light, or gone out In many other the reasons why, such as aesthetic property.Light source can be coupled to radiator, wherein at least a portion of the radiator to Environment opening is to promote to radiate.Radiator is used as the heat dissipation element of light source so that heat can be away from light source.Radiator can be with Mechanical support is provided to light source.For example, radiator can be basically attached optical element and be couple to positioned at optical element Interior light source.Light source is effectively held in optical element by the coupling.In addition, radiator can be basically attached to one Or more reflector.These architectural features of the present invention enable the illuminator based on SSL to have very high hair Light effect value, and produce the light level similar to or greater than traditional lighting light fixture (such as fluorescence or incandescent lighting light fixture).This The configuration of invention and use to SPE technologies also extend the life durability of the light source based on SSL.
The use of material for transformation of wave length helps to produce following light：The light on aesthetic property be similar to by conventional lamp (such as Using the light fixture of incandescent A lamps) caused by light.As described above, the material for transformation of wave length of the present invention can be by being suitable for absorbing one Radiation in spectral regions and one or more materials composition for launching the radiation in another spectral regions, and these materials Can be lower conversion or up-conversion.In this way, embodiments of the invention can merge lower conversion material for transformation of wave length, on Material for transformation of wave length of conversion or both.It should be appreciated that term " lower conversion (down conversion) ", " lower conversion (down converting) " and " (the down converted) of lower conversion " refer to being suitable for absorbing in a spectral regions Radiate and launch the material of the radiation in another spectral regions.So as to which term " lower transition material " is defined as following material Material：These materials can be absorbed radiating in a spectral regions by its component and launch the radiation in another spectral regions.
When the light launched from light source reaches material for transformation of wave length, material for transformation of wave length absorbs the light and hair of the wavelength Penetrate converted light.For example, when material for transformation of wave length includes lower transition material, the lower transition material absorbs short-wavelength light simultaneously And the light of the lower conversion of transmitting.The light for the lower conversion launched can be propagated along all directions (is referred to as lambert (Lambertian) illuminator), therefore, a part for the light of lower conversion is upwardly propagated, and another part is propagated downwards.Under The transition material just light that (or outwards) leaves away upwards forwards part, and towards light source return downwards just to Translator unit afterwards.This is described further below with reference to Fig. 1.
The light fixture of the present invention realizes the remote wavelength conversion concept associated with SPE technologies.Using long-range lower conversion material In the system of material, launch the short wavelength radiation energy from light source away from the lower transition material of light source arrangement.Lower turn of hit At least a portion of the emittance of conversion materials is converted to the radiation of longer wavelength by under, when the two radiation mixing, produces The white light similar with the light as caused by conventional lamp.Material for transformation of wave length can be by being suitable for absorbing the spoke in a spectral regions Penetrate and launch one or more lower transition material compositions of the radiation in another spectral regions.Material for transformation of wave length can be with Mix or used as individual course.Multiple material for transformation of wave length can be by from the wavelength convert that light source is launched to identical Or different spectral regions.So as to, material for transformation of wave length can include one or more lower transition materials, up-conversion or Both, can be selected it to produce desired light output and color rendering properties.
Fig. 1 is shown uses solid state light emitting diode (LED) 102 and wavelength according to exemplary embodiment of the invention Transition material 104 produces the method for visible ray.As shown, wavelength is hit from the light radiation 100 launched of LED 102 to turn Conversion materials 104.Material 104, which is wavelength-converted, from some in the light radiation 100 of the transmittings of LED 102 is reflected into what is transmitted backward Unconverted radiation 106.The other parts for the light radiation 100 launched from LED 102 are wavelength-converted material 104 and changed simultaneously And it is the radiation 118 of conversion transmitted backward by backward launched.Some in the light radiation 100 launched from LED 102 pass through ripple Long transition material 104 is as the unconverted radiation 108 to front transfer, and some radiation are made through material for transformation of wave length 104 For to the converted radiation 114 of front transfer.In addition, material for transformation of wave length 104 can launch the He of converted radiation 116 of forescatering The converted radiation 120 scattered backward.The converted radiation 120 scattered backward and the converted radiation 118 transmitted backward are totally counted as The wavelength convert radiation 112 transmitted backward, and the converted radiation 116 of forescatering and the totality of converted radiation 114 to front transfer It is counted as radiating 110 to the wavelength convert of front transfer.Light source is disposed remotely to the use of the SPE technologies of material for transformation of wave length Make it possible to improve the unconverted photon 106 reflected and the unconverted photon 108 transmitted, be wavelength-converted The converted photons 118 reflected and the converted photons 114 and the converted radiation of forescatering transmitted that material 104 is changed 116 and the extraction of the converted radiation 120 scattered backward.
Optical element can take up the interval for separating LED and material for transformation of wave length.In certain embodiments, optics Element can be attached to LED light source at one end and be attached to material for transformation of wave length in the other end.Optical element, which can use, appoints The 3 dimensional coil geometry of meaning, such as spherical, parabolical, cone and ellipse.Optical element be also described as have from Circle, triangle, hexagon, it is trapezoidal, semicircle and oval etc. in the section shape that selects.Optical element can be basic Upper transparent and printing opacity medium, such as air, glass or acrylic resin.It can be come using one or more reflectors Receive and reflect the light (that is, the light of transmission) launched by light source and changed under lower transition material.Reflector, which can use, appoints The geometry of meaning, such as spherical, parabolical, cone and ellipse, and can be by various reflections as known in the art Face forms.In addition, reflector can be individual unit or recombiner unit, wherein recombiner unit includes each having their own Multiple reflectings surface of geometry, transmissivity and material component.For example, reflector can be aluminium, have AM aluminum metallization reflecting layer Plastics or other any type of reflectings surface.Reflector is arranged to the light of the lower conversion of reflection, and can be with lower conversion Material phase separation or adjacent.In certain embodiments, more than one reflector can be used individually, or be used as having There is a part for the complex reflector of multiple geometrical constructions.
In some embodiments of the invention, reflector can be the optical element of such as glass, and it has been processed into Assign reflection characteristic to the optical element.For example, reflector can deposited or be otherwise applied as thereon film Optical element.Such reflector is referred to as dichroic filter, thin film filter or interference light filter in the art, and Being usually used to optionally makes the light of small range color pass through and reflect other colors.Comparatively, dichronic mirror tends to use The color of its light reflected characterizes, rather than color through dichronic mirror.For simplicity, due to handling in this way Reflector can be optionally while ground allows some light to pass through and reflect other light, so handling in this way Reflector is sometimes referred to herein collectively as " dichroic reflector " herein.As it is known in the art, for example such dichroic reflector Can for specific wavelength, heat, light or the radiation for being launched by light source other be characterized in it is selective.The present invention's Reflector and optical element can have the transmission of change, i.e. they can be selected to allow or reflect any range Radiation.For example, optical element can be fully transparent, and all light radiation are allowed to pass through.However, as this area is general Known to logical technical staff, though fully transparent optical element may also have some micro reflectance signatures (for example, It has been found that the light radiation of clear glass reflection about 4%), its be considered as optical element it is intrinsic.Alternately, light It can be fully reflective property to learn element, and does not allow any light radiation to pass through.Furthermore it is possible to prefabricated optics of the invention Element and reflector so that they include some parts with specific light transmission amount and allow or reflect different amounts of light radiation Other parts.So as to, each optical element or reflector can throughout have identical transmission level, or including tool The different piece of the transmission level changed.Any of optical element can be realized by many means known in the art The transmissivity of scope.
In at least one embodiment of the present invention, using routine techniques as known in the art by material for transformation of wave length Apply to and be contained on optical element or reflector.In another embodiment, by (such as lower turn of material for transformation of wave length Conversion materials) it is integrated into optical element or reflector.For example, during acrylic resin manufacturing process, it can manufacture and be associated with The acrylic resin optical element of lower transition material (such as phosphor), so as to produce integrated lower transfer optics.
It is described in detail as mentioned above for Fig. 1, material for transformation of wave length can transmit, change or reflected light radiation.Some light spokes Unconverted light radiation can be reflected as back towards light source by penetrating.Converted light can be transmitted to front transfer or backward. In addition, some light can not converted (that is, unconverted transmission radiation) and pass through material for transformation of wave length.By catching The transmitting portions forward and both transmitting portions backward of the light of lower conversion are obtained, improve system effectiveness.Similarly, when using one During individual or more reflector, the position of lower transition material and reflector can be adjusted to ensure the light from light source equably The lower transition material of impact, to produce uniform white light and so that more light leave device.At the same time, by lower conversion material Material is arranged remotely from light source and prevents light to feed back in light source.So further make the heat minimum at light source, so as to lead Cause increased light output and life-span.Compared to the prior art, all these structural parameters and feature make it possible to increase light production Amount, strengthen illumination efficiency, and improve capacity usage ratio.
The Sony ericsson mobile comm ab of the present invention can also include miscellaneous part as known in the art.For example, SSL devices are also Electronic driver can be included.Most of SSL sources are low-voltage direct (DC) sources.Therefore, it is necessary to which electronic driver adjusts voltage With electric current to be used in the light fixture based on SSL.Alternately, some exchange (AC) SSL sources be present, for example, by South Korea Seoul The AC-LED that is sold with trade name " Acriche " of SSC company.In these cases, SSL sources (e.g., LED or LED array) can be directly connected to can be from the AC power supplies that power network obtains.Therefore, alternatively, embodiments of the invention can wrap Electronic driver is included, at least a portion of the electronic driver is located in the base of light fixture, and this is depended in the lamp based on SSL The type in the SSL sources used in tool.The present invention can also include at least one electronic conductor, such as connecting wire.Electronic conductor It can be arranged in optical element to couple the electric current between lamp base and light source.
It can be arranged with any to use the light fixture of the present invention.For example, at least one embodiment of the present invention is suspension type Light fixture or top light fixture.In such embodiments, light fixture can have one or more hitches, such as hanger bar, Hawser or flange.In another embodiment of the invention, light fixture is wall-mounted light fixture.In such embodiments, can be horizontal Ground, vertically or think and realize that desired aesthetic property and any other mode needed for light output carry out mounted lamp.In other realities Apply in example, the present invention is the system for including one or more light fixtures.In such embodiments, the lamp system can include Many similar light fixtures or different light fixtures.One or more embodiments of the present invention may be configured to suspension type, wall hanging Formula or both.For example, some embodiments of the present invention may be configured to serve as crown suspension type light fixture or serve as wall-mounted type lamp Tool, it has suspension arrangement and can adapt to the miscellaneous part of any configuration.In addition, depending on desired photograph in illumination region Bright amount and other factors (such as visual aesthetics), embodiments of the invention can be provided with sensing or away from illumination regions Optical element or reflector.These embodiments may be better understood according to figure described below.
Fig. 2 (a) is suspension type according to an embodiment of the invention or the diagram of top solid state light emitter light fixture.Fig. 2 (a) the suspension type light fixture shown in is considered as the configuration of squash type light fixture, because the section profile of the light fixture is along its trunnion axis Line is substantially uniform.Term " squash type " is not intended to is limited to any specific manufacture by the present embodiment of the present invention Technique (such as extrusion process) or its result.Alternatively, the squash type of the present invention can be manufactured by many known methods SPE light fixtures and its all parts.Term " squash type " be used for alternatively referring to herein with fixed section profile but It is the configuration of the SPE light fixtures with elongated side.Certainly, other embodiment can show section profile along horizontal axis Change.As shown, the light source of light fixture includes multiple illuminators in LED arrays 212.LED array 212 is arranged in tool Have in the angle of triangular cross-section optical element 206 of the concave surface of remote light source.LED array is downwardly against the recessed of optical element Surface launching light radiation, wherein, the depositing wavelength transition material 204 on the concave surface of optical element.Light fixture also includes two parabolics Shape reflector 208, it is arranged in optical element 206 and the top of LED array 212.Reflector by being launched by LED array and Desired environment, i.e. illumination region are reflexed to by light that is lower conversion and being transmitted backward towards reflector.In Fig. 2 (b) The embodiment is done described in further detail, Fig. 2 (b) illustrates the section of the solid state light emitter light fixture shown in Fig. 2 (a) Figure.As shown, LED array (it is shown as a LED illuminator 202 in this view) is downwardly against including lower turn The material for transformation of wave length 204 of conversion materials launches light radiation.Material for transformation of wave length 204 is deposited on triangular cross-section optical element 206 Concave surface on.If it is desirable for the configuration of specific light fixture, light efficiency and output, in other walls of optical element On can also coat material for transformation of wave length.In the light radiation 214 launched some by it is lower change and be to front transfer Through the light 220 to front transfer of the concave surface of optical element 206.In the light radiation 214 launched some by it is lower conversion and It is the light 222 transmitted backward through the side wall of optical element 206 towards reflector 208 by transmission backward, wherein converted Light radiation is reflected.In the illustrated embodiment, reference 214,220 and 222 represents light beam, rather than physical component, It is not claimed part.
It is expected the direction phase of the light ray with being transmitted through lower conversion layer in the direction for impinging upon the light ray on reflector Together.Therefore, total light output of light fixture can be the light through the transmission of lower transition material and the combination of the ray transmitted backward. However, depending on the size of reflector, geometry and distance with optical element, from material for transformation of wave length backward The ray of transmission may be impinged upon on ceiling or wall without hit reflector.Such upward ray for indirectly- Direct-type light fixture will be useful, and it will cause the brightness of the upper space in room to increase.
In the present embodiment, the material for transformation of wave length being deposited on the concave surface of optical element can be surrounded by optical element To prevent harmful dust accretions, wherein over time, these harmful dust accretions are likely to reduced the total of light fixture Light output.As described above, material for transformation of wave length is to absorb radiating and launching in another spectral regions in a spectral regions The material of radiation.In the exemplary embodiment, material for transformation of wave length can include single material for transformation of wave length.Alternative Embodiment in, material for transformation of wave length can include more than one material for transformation of wave length.Multiple material for transformation of wave length can By from the wavelength convert that illuminator is launched to identical or different spectral regions.In exemplary or alternative embodiment, wavelength Transition material can include：One or more phosphors, such as the yttrium-aluminium-garnet (YAG doped with cerium:Ce), doped with Strontium sulfide (the SrS of europium:Eu), doped with the YAG of europium:Ce phosphors；YAG:Ce phosphors add cadmium selenide (CdSe)；Or from bag Include other kinds of quantum dot caused by the other materials of lead (Pb) and silicon (Si)；Etc..In alternative embodiment, phosphorus Body of light layer can include other phosphors, quantum dot, quantum dot crystal, quantum dot nano crystal or other lower transition materials.Ripple Long transition material can be lower conversion crystal, rather than the dusty material mixed with bonding medium.Wavelength conversion material layer can be with Additional scattering particles including such as microsphere, to improve the mixing of the light of different wave length.In alternative embodiment, Material for transformation of wave length can be made up of multiple continuous or discrete sublayer, and each sublayer includes different material for transformation of wave length. For example, can by installing, coating, depositing, mould printing, screen printing and any other suitable technology form wavelength Transition material.Material for transformation of wave length can be partially formed on a wall of optical element.All realities disclosed herein Applying example can be using any one in phosphor described herein.
Additional benefit can be realized by using radiator.The embodiment that Fig. 2 (a) is shown into Fig. 2 (c) is suspension Formula or top light fixture, it is attached to surface by one or more hitches.It is, for example, possible to use messenger wire or suspension rod (hollow or solid) carrys out suspended lamp.Hitch can also include power line, control line or need be included in light fixture in its In terms of him.The power line and control line of light fixture can link together with messenger wire or positioned at pole face.
Fig. 2 (c) illustrates the enlarged drawing for the Fig. 2 (b) for showing radiator 210 and LED illuminator 202.The quilt of radiator 210 It is shown as being attached to the bottom of LED illuminator 202, because the present embodiment is illustrated as suspension type or top light fixture, this reality Represent radiator 210 around LED illuminators 202 or above LED illuminator 202 on border.At least one of radiator 210 Divide positioned at the outside of the cover created by optical element 206.Radiator can include a series of fins.Alternatively or additionally Ground, radiator can be included as off line：The net extends from radiator 210 and around LED illuminator 202 and optical element At least a portion of the outer surface of optical element 206 between concave surface.Radiator 210 can be by as known in the art various Heat sink material is fabricated, such as aluminium, copper and carbon fiber.Radiator can coat color, such as coated white to strengthen or change Become the heat dispersion of material.At least a portion of radiator 210 is located at the outside of optical element 206, and radiator 210 couples To the LED illuminator 202 of inside.For example, this can be in optical element one substantially opposite with the concave surface of optical element Realized at critical point on end.The coupling effectively remains essentially in LED illuminators 202 in optical element 206, simultaneously Also by the seal closure of optical element 206.Once complete assembling, the inside of optical element 206 can be it is solid, vacuum or Person can be filled with air or inert gas.
Fig. 3 is the diagram of solid state light emitter light fixture according to another embodiment of the present invention.Because such light fixture only passes through One hitch suspension, so the light fixture is considered suspention light fixture.Because surround its vertical axis circumferentially in light fixture The section profile of light fixture is substantially uniform during rotation, so the suspention light fixture shown in Fig. 3 is also considered as rotary lamp Tool configuration.Certainly, when light fixture rotates around vertical axis, other embodiment can show the change of section profile.In Fig. 3 institutes In the embodiment shown, LED array 312 is arranged to downwardly against the distal end being deposited on conical transmission optical component 306 Material for transformation of wave length 304 launches light radiation.Cone reflection is turningly attached on LED array 312 and optical element 306 Device 308, so as to provide hourglass profile for complete light fixture 300.Between reflector 308 and optical element 306, radiator 310 It is adjacent to or is attached to LED array 312.In this embodiment, hanging type light fixture 300 is hung by single hitch 330 In lighting position.Radiator 310 can be used for mechanically supporting radioluminescence source (being in the present embodiment LED array 312), And for the purpose that radiates.
Fig. 4 (a) to Fig. 4 (f) diagram according to other embodiments of the invention with one or more light sources, wavelength turn The profile for the various light fixtures configuration that conversion materials, radiator, optical element and reflector are characterized.As shown, light source can To be arranged on an illuminator between reflector and optical element.Fig. 4 (a), which is shown, is thrown light using an illuminator To the embodiment for the material for transformation of wave length for being deposited on triangular optical element or being integrated with triangular optical element. Fig. 4 (a) and Fig. 4 (f) show material for transformation of wave length can be deposited on one or more surfaces of optical element or with The embodiments of the invention that one or more surfaces of optical element integrate.As Fig. 4 (a) is shown into Fig. 4 (f) And it is stated above, optical element can use many other shapes.It is real in the light fixture that Fig. 4 (a) to Fig. 4 (f) is shown Apply in each in example, some light radiation launched by light source can be reflected as unconverted light spoke back towards light source Penetrate.Converted light can transmit to front transfer or backward.In addition, some light can not be converted and pass through wavelength convert material Material transmits (that is, unconverted transmission radiation).By capturing the transmitting portions forward of conversion light and backward transmitting portions two down Person, system effectiveness can be improved.Similarly, when using one or more reflectors, lower transition material and anti-can be adjusted The position of emitter is to ensure that the light from light source equably hits lower transition material, to produce uniform white light and cause more More light leave device.At the same time, lower transition material is arranged remotely from into light source prevents light to feed back to light source backward In.Therefore, further make the heat minimum at light source, and cause increased light output and life-span.It can come in any way Optical element and the shape of reflector and the position of illuminator and quantity are configured, it is increased to realize compared to the prior art The capacity usage ratio of light yield, the light efficiency of enhancing and raising.
Fig. 5 (a) to Fig. 5 (c) diagrams are according to other embodiments of the invention with one or more light sources, wavelength convert The profile for the various light fixtures configuration that material, radiator, optical element and reflector are characterized.As shown, can use Substantial amounts of light source.For example, Fig. 5 (a) to Fig. 5 (d) shows the embodiment each with multiple illuminators 502.Fig. 5 (a) is shown Light is invested using two illuminators 502 and is deposited on pentagon optical element or with pentagon optical element is integrated in one The embodiment of the material for transformation of wave length risen.Illuminator 502 is attached to radiator 510.Illuminator 502 is arranged in and optical element 506 deposition has on one or more surfaces of the substantially opposite optical element 506 in the surface of material for transformation of wave length 504. In the configuration, illuminator 502 is arranged between material for transformation of wave length 504 and reflector 508.Illuminator 502 turns towards wavelength Conversion materials 504 launch light radiation, wherein, at least some light radiation are changed and transmitted backward along the direction of illuminator. At least a portion that reflector 508 is arranged in the converted light radiation that will be transmitted backward reflexes to desired environment, i.e., Illumination region.In the configuration shown in Fig. 5 (a), in addition to the converted light radiation to front transfer, reflector also reflects The converted light radiation transmitted backward, with to it is expected that area is illuminated.
The pentagon optical element shown in Fig. 5 (a) is overturn in Fig. 5 (b).Fig. 5 (c) and Fig. 5 (d) show basis The other configurations of the light fixture of at least one embodiment of the present invention.Fig. 5 (c) and optical element shown in Fig. 5 (d) can also be by Regard pentagon optical element as, but there is the triangular-shaped profile of indent rather than the triangular-shaped profile of evagination.In Fig. 5 (a) extremely Light fixture embodiment shown in Fig. 5 (d) it is each in, used multiple illuminators 502, wherein each illuminator be attached to it is scattered Hot device 510.Fig. 5 (b) shows that material for transformation of wave length 504 is deposited on a surface of optical element 506 or and optical element The embodiment that 506 surface integrates, and Fig. 5 (c) shows that material for transformation of wave length 504 is deposited on optical element The embodiment integrated on 506 multiple surfaces or with multiple surfaces of optical element 506.In the reality shown in Fig. 5 (d) Apply in example, material for transformation of wave length 504 is deposited on the single surface of the optical element 506 vertical with the surface with illuminator 502 On.In the embodiment shown in Fig. 5 (a) to Fig. 5 (d), some light radiation launched by illuminator 502 can be back towards light Source is reflected as unconverted light radiation.Converted light can transmit to front transfer or backward.In addition, some light can be with It is not converted and through material for transformation of wave length transmission (that is, unconverted transmission radiation).Shown in Fig. 5 (b) and Fig. 5 (c) Embodiment in, material for transformation of wave length is deposited on one or more surfaces of the optical element between light source and reflector. In such embodiments, reflector captures and reflects the transmitting portions forward of lower conversion light radiation.Allow lower conversion light spoke That penetrates transmits the transmissive surface for partially passing through optical element backward.By the transmitting portions forward and backward for capturing lower conversion light Both transmitting portions, system effectiveness can be improved.As set forth above, it is possible to configure optical element and reflector in any way Shape and illuminator position and quantity, with realize compared to the prior art increased light yield, enhancing illumination imitate Rate and the capacity usage ratio improved.
The light fixture of the present invention can merge one or more reflectors with innumerable shapes and size.Fig. 6 (a) is extremely The cross section view of the various light fixtures with reflector of different shapes of Fig. 6 (c) diagrams according to other embodiments of the invention. Such reflector can be both used together with the extrusion pressing type light fixture shown in such as Fig. 2 (a) and Fig. 6 (a) to Fig. 6 (c), It can be used together with the rotary-type light fixture shown in Fig. 3.In addition to squash type or rotary light fixture, SPE lamps of the invention The optical element of tool can also have multiple sides.For example, optical element can have square, rectangle, trapezoidal, pentagon, six The planform such as side shape or octagon.The present invention can be merged into the optical element of any one in these planforms Embodiment in any one in.
Fig. 7 (a) and Fig. 7 (b) diagrams use the of the invention of SPE technologies characterized by luminous body array 712 other to show Example property embodiment.Fig. 7 (a) and Fig. 7 (b) illustrates when the embodiment as wall lamp and the pendent lamp as suspension respectively.Here, pacify The wall or ceiling for filling light fixture can play reflector.Fig. 7 (c) shows the profile for two embodiments.Such as Shown, SPE light fixtures include the optical element 706 that deposition has wavelength conversion material layer 704.It can use with highly transmissive The reflector 708 (such as transparent lid) of (that is, low reflectance coating) is measured, to control the output spectrum of light fixture and provide expectation Aesthetic property.The enlarged drawing of Fig. 7 (d) pictorial images 7 (c), it shows radiator, optical element and solid state light emitting diode (LED).LED or LED array can be installed on a heat sink.Supporting radiator can be carried out using mechanical part or hitch And light fixture is attached on wall or ceiling.
Fig. 8 (a) diagrams use the further example embodiment of the invention of SPE technologies.Fig. 8 (a) diagrams are sent out using solid-state Another efficient fixture of body of light and distal end material for transformation of wave length.Fig. 8 (b) is the profile of the light fixture in Fig. 8 (a).As shown , light fixture includes the material for transformation of wave length 804 away from light radiation illuminator 802.804 liang of illuminator 802 and material for transformation of wave length Person is attached to optical element 806 or integrated with optical element 806.Material for transformation of wave length 804 can be phosphor.Can To control output beam to be distributed using reflector 808, and improve the color homogeneity of light beam.As described above, radiating Device 810 can be used for installing illuminator 802 and for radiating.Material for transformation of wave length 804 is hung using hitch 830 The top of illuminator 802 in the cover created by optical element 806.Hitch 830 can be also used for SPE lamp installations Onto wall or ceiling.For including improving Beam Control, light efficiency and multiple reasons of aesthetic property, multiple reflectors can To be used alone or be used together as compound reflecting surface.Fig. 8 (c) diagrams merge cuing open for the embodiment of complex reflector 808 Face figure.The typical case of SPE light fixtures shown in Fig. 8 (a) to Fig. 8 (c) is recessed down light, suspension type cylinder etc. and track Down lamp.
Fig. 9 (a) and Fig. 9 (b) diagrams include of the invention other realities of multiple SPE light fixtures as SPE lamp systems or component Apply example.SPE lamp systems can be made up of one or more SPE light fixtures, the SPE light fixtures as shown in Fig. 2 to Fig. 8.Should SPE light fixtures in SPE lamp systems can be with identical or different.Such as those of ordinary skill in the art it is contemplated that, can be via light Learn element, reflector, radiator, hitch or each SPE light fixtures are connected via other known part.
Heat from LED light source and other the required electronic components added in light fixture limits can be with reliability The population size for the LED that can be used, therefore, limit the amount of caused light.Embodiments of the invention so place LED source and Radiator so that more as caused by LED the dissipation of heat into environment.This, which is arranged such that, can produce a greater amount of light, simultaneously Ensure the appropriate operating temperature of maintenance LED and electronic component.With the benefit phase realized in completely enclosed lighting apparatus Than the arrangement even can be more beneficial for the application that SPE light fixtures are used in open lighting apparatus.
As mentioned previously, higher wavelength radiation can be converted to by hitting the emittance of lower transition material, and be worked as During mixing, it will provide with conventional lamp caused by the similar white light of light.The spectrum of final light output depends on wavelength convert Material.Total light extraction depends on reaching the amount of light, the thickness of wavelength conversion layer and the optical element of wavelength conversion layer and anti- The material and design of emitter.Can be in a manner of being expected to realize the performance of SPE light fixtures and any of aesthetic property target, to determine this The shape and size of a little parts.Following example and form details the efficiency realized by the SPE light fixtures of the present invention and light spoke Penetrate improvement.
Example
In at least one embodiment of the present invention, the LED encapsulation piece using SPE technologies is implemented.With typical routine White LED packaging part (wherein, lower converting phosphors are dispersed in around light source or chip) is different, is encapsulated in the SPE of the present invention In part, phosphorescent layer is moved to away from chip, and transparent medium is left between chip and phosphor.Can be via ray tracing point Analyse to determine the effective geometry for such packaging part.It need not repeat, SPE packaging parts need different Phosphorescence volume density has the white light of the chromaticity coordinate similar with the White LED packaging part of routine to produce.The difference is by mixing Caused by the SPE packaging parts for closing transmission light and back reflected light with different spectrum, and conventional packaging part mainly uses Transmit light.
Computer simulation is carried out to determine that the light output using SPE light fixtures according to an embodiment of the invention is improved.Figure 10 (a) the light fixture model shown in is arranged in ray tracing software.Shown in light fixture model and Fig. 2 (a) shown in Figure 10 (a) It is similar, but neither one or more reflector.For the sake of clarity, analyzed light fixture will be described in detail with reference to figure 2 (a) Configuration.Blue led array 212 is surrounded by transparent optical element 206.Phosphor wavelength transition material 204 adheres to or sunk Product is on the concave surface at the bottom of optical element 206.Phosphorescence volume density is selected to realize on the black body locus of 1931CIE figures 6500 Kelvin's correlated colour temperatures (CCT).
Some tracking rays of Figure 10 (b) diagram models.By blue led is changed into the White LED of identical quantity come Model another light fixture.Phosphorescent layer is changed into the diffuser with identical size.White LED includes blue LED die and dissipated Phosphor of the cloth around blue LED die.The emittance and transmitting beam angle of blue LED die in White LED It is identical with the emittance of blue led and transmitting beam angle used in SPE light fixtures.CCT values in White LED It is identical with the CCT values in chromaticity coordinate and SPE light fixtures and chromaticity coordinate.Table 1 below illustrates the knot of the comparative analysis Fruit：
Table 1：The result of comparative analysis
CCT CIE(x,y) Luminous flux (lm)
SPE light fixtures 6300K (0.316,0.333) 541.3
White LED light fixture 6293K (0.315,0.334) 416.2
As shown in Table 1 above, analog result proves：When SPE light fixtures and use in the two configurations of the light fixture of White LED CCT it is identical with chromaticity coordinate when, SPE light fixtures have than using White LED light fixture more than about 30% light.
So as to which the present invention relates to the efficiently illuminator based on SPE, the illuminator includes solid state radiation illuminator (for example, LED), material for transformation of wave length (for example, phosphor) and reflector.Material for transformation of wave length is arranged to away from LED.Can To extract the photon transmitted backward from material for transformation of wave length, to increase the overall efficiency of light fixture.Therefore, the light fixture needs Less LED or less electric energy, and manufacturing cost can be lower.
It should be appreciated that the geometry of the SPE light fixtures of the present invention is not limited to the specific shape shown in above-described figure The shape presented in shape or example.Alternative shape can be used to realize specific performance or aesthetic property, while solve it He designs concern, such as light color and light source life.It is of the invention although describing the present invention with reference to exemplary embodiment Not limited to this.More properly, appended claims should be interpreted as including：In the connotation and model without departing from the present invention Other modifications of the invention made on the premise of enclosing by those of ordinary skill in the art and embodiment.
Note：
A kind of 1. scattered photon extraction light fixtures are attached, including：
Optical element, the optical element have first surface and extended from the first surface at least one basic Upper transparent side wall；
For launching the light source of short wavelength radiation, the light source is arranged in the first surface with the optical element On one end of the side wall of relative at least one substantial transparent；
Material for transformation of wave length, the material for transformation of wave length are arranged on the first surface of the optical element, are used for Receive and the short wavelength radiation that lower conversion is launched by the light source in it is at least some, and received by transmitting backward And the part in the radiation of lower conversion；And
One or more reflectors, the reflector are arranged to relative with the material for transformation of wave length so that described Light source is arranged between the material for transformation of wave length and the reflector, described at least one substantially saturating for being reflected through It is at least some in the radiation that bright side wall is extracted from the optical element；
Wherein, the side wall of at least one substantial transparent is connected to comprising the material for transformation of wave length at one end The first surface, and the light source is connected in the other end, and wherein, the side wall of the substantial transparent is configured For the radiation transmitted backward from the material for transformation of wave length to be sent to the outside of the light-emitting device.
Light fixture of the note 2. according to note 1, in addition to the wavelength being arranged at least one transparent side wall turn Conversion materials.
Light fixture of the note 3. according to note 1, in addition to be attached to the light source or be adjacent to the radiating of the light source Device.
Light fixture of the note 4. according to note 3, wherein, the radiator is attached at least one base in side Transparent side wall in sheet, and it is attached to one or more reflectors in opposite side.
Light fixture of the note 5. according to note 1, wherein, the light fixture is squash type light-emitting lamp or rotary luminous Light fixture.
Light fixture of the note 6. according to note 1, in addition to one or more hitches.
A kind of 7. squash type scattered photon extraction light fixtures are attached, including：
For launching the light source of short wavelength radiation, the light source includes one or more illuminators；
Elongated tubular optical element, it has the surface of at least one substantial transparent；
Material for transformation of wave length, the material for transformation of wave length be arranged at least one surface of the optical element or with At least one surface of the optical element integrates, and away from the light source, for reception and lower conversion by described It is at least some in the short wavelength radiation of light source transmitting, and the radiation of received and lower conversion is transmitted backward In a part；And
One or more reflectors, one or more reflector are arranged to and the material for transformation of wave length Relatively so that the light source is arranged between the material for transformation of wave length and the reflector, for reflect it is received and It is and at least some in the backward transmitting portions in the radiation of lower conversion；
Wherein, the light fixture is configured so that：Some radiation can be reflected as unconverted back towards the light source Light radiation, some light can not be converted and transmitted by the material for transformation of wave length, and some radiation by the wavelength turn Conversion materials are changed and can transmitted by the material for transformation of wave length to front transfer or backward；
And wherein, the light fixture is configured to：By the arrangement of the light source, optical element and reflector, base is captured All converted light to front transfer and the converted light transmitted backward in sheet.
Light fixture of the note 8. according to note 7, in addition to be attached to the light source or be adjacent to the radiating of the light source Device.
Light fixture of the note 9. according to note 7, wherein, the radiator is attached at least one base in side Transparent side wall in sheet, and it is attached to one or more reflectors in opposite side.
Light fixture of the note 10. according to note 7, wherein, the light fixture can be arranged on wall or hang overhead On.
Light fixture of the note 11. according to note 1 or 7, wherein, the light source includes at least one semiconductor light emitting two Pole pipe.
Light fixture of the note 12. according to note 1 or 7, wherein, the light source is partly to lead light emitting diode, including luminous One of diode (LED), laser diode (LD) or resonant cavity light emitting diodes (RCLED).
Light fixture of the note 13. according to note 1 or 7, wherein, the light source is more than one light emitting diode (LED) Array.
Light fixture of the note 14. according to note 1 or 7, wherein, the material for transformation of wave length is selected from phosphor, quantum Point, quantum dot crystal and quantum dot nano crystal.
Light fixture of the note 15. according to note 1 or 7, wherein, the optical element, which has, comes from spherical, parabolic Shape, the 3D shape of cone and ellipse and/or come from triangle, hexagon, trapezoidal, semicircle and half elliptic Section shape.
Note 16. according to note 1 or 7 described in light fixtures, wherein, the optical element can be come from air, glass and The substantial transparent of acrylic resin and the medium of printing opacity.
Light fixture of the note 17. according to note 1 or 7, wherein, one or more reflector, which has, to be selected from The geometry of spherical, parabolical, cone and ellipse.
A kind of 18. scattered photon extraction light fixtures are attached, including：
For launching the light source of short wavelength radiation, the light source includes being attached to the one or more of the first optical element Individual illuminator；
Material for transformation of wave length, the material for transformation of wave length be arranged on the second optical element or with second optics member Part integrates, for receive and short wavelength radiation that lower conversion is launched by the light source in it is at least some, and backward A part in the radiation of received by transmitting and lower conversion；And
Reflecting surface, the reflecting surface are attached to first optical element in side and include described second to be formed The reflector of optical element and the material for transformation of wave length, in the radiation for reflecting received and lower conversion after It is at least some into transmitting portions；
Wherein, second optical element and the material for transformation of wave length are suspended in the reflecting surface and remote The light source.
Scattered photon of the note 19. according to note 18 extracts light fixture, in addition to radiator, the radiator attach To the light source or the light source is adjacent to, and is at least partially situated at the outside of the reflector.
Scattered photon of the note 20. according to note 18 extracts light fixture, wherein, the reflector, which has, comes from three Angular, hexagon, trapezoidal, semicircle and half elliptic section shape.
Scattered photon of the note 21. according to note 18 extracts light fixture, wherein, the reflector is that have to be more than one The compound reflecting surface of individual geometry.
A kind of 22. scattered photon extraction lamp systems are attached, including：
Multiple light-emitting lamps, each include：
Optical element, the optical element have first surface and extended from the first surface at least one basic Upper transparent side wall；
For launching the light source of short wavelength radiation, the light source is arranged in the first surface with the optical element On one end of the side wall of relative at least one substantial transparent；
Material for transformation of wave length, the material for transformation of wave length are arranged on the first surface of the optical element, are used for Receive and the short wavelength radiation that lower conversion is launched by the light source in it is at least some, and received by transmitting backward And the part in the radiation of lower conversion；And
One or more reflectors, one or more reflector are arranged to and the material for transformation of wave length Relatively so that the light source is arranged between the material for transformation of wave length and the reflector, for be reflected through it is described at least It is at least some in the radiation that the side wall of one substantial transparent is extracted from the optical element；
Wherein, the side wall of at least one substantial transparent is connected to comprising the material for transformation of wave length at one end The first surface, and the light source is connected in the other end, and wherein, the side wall of the substantial transparent is configured For the radiation transmitted backward from the material for transformation of wave length to be sent to the outside of the light-emitting lamp.
Lamp system of the note 23. according to note 22, in addition to：
One or more reflectors, one or more reflector are arranged to and the material for transformation of wave length In it is each relative so that the light source is arranged between the material for transformation of wave length and the reflector, or is disposed in On the reflector.
Lamp system of the note 24. according to note 22, in addition to be attached to the light source or be adjacent to the light source Radiator.
Lamp system of the note 25. according to note 22, wherein, the radiator is attached to described at least one in side The side wall of individual substantial transparent, and it is attached to one or more reflectors in opposite side.
Lamp system of the note 26. according to note 25, wherein, one or more reflector will be more than one Light-emitting lamp link together.
Lamp system of the note 27. according to note 22, wherein, the more than one light-emitting lamp is identical or different.
A kind of 28. scattered photon extraction light fixtures are attached, including：
Optical element, the optical element have first surface and one or more second surfaces, first table Face has two relative sides, wherein, one or more second surface tangentially or is vertically connected to described first Each side on surface；
For launching one or more illuminators of short wavelength radiation, one or more of illuminators are arranged in institute State on one or more second surface of optical element；
Material for transformation of wave length, the material for transformation of wave length are arranged on the first surface of the optical element, are used for Receive and the short wavelength radiation that lower conversion is launched by the illuminator in it is at least some, and received to front transfer To and lower conversion radiation in a part；And
One or more reflectors, one or more reflector are arranged to and one or more Illuminator is relative so that and the material for transformation of wave length is arranged in one or more between illuminator and the reflector, It is at least some into the radiation of front transfer for being reflected through the optical element；
Wherein, one or more second surface is each connected to comprising the material for transformation of wave length at one end The first surface, and one or more reflector is connected in the other end, and wherein, it is one or more Multiple second surfaces are configured to：The radiation transmitted backward from the material for transformation of wave length is sent to the light-emitting lamp It is outside.
Light fixture of the note 29. according to note 28, in addition to be attached to or be adjacent to one or more and light The radiator of body.
Light fixture of the note 30. according to note 28, wherein, the light fixture is squash type light-emitting lamp or rotary hair Light light fixture.
Light fixture of the note 31. according to note 28, in addition to one or more hitches.

Claims (10)

1. a kind of light fixture, including：
Radiator, the radiator have surface；
Light source, the light source are connected to the surface and are arranged to launch light；
Reflector, the reflector have the summit close to the surface, and the reflector is arranged between the radiator Separate, and be arranged to the light being reflected into and be just upwardly away from the reflector；And
Material for transformation of wave length, the material for transformation of wave length is arranged to be spaced apart with the light source in said direction.
2. light fixture according to claim 1, wherein, the material for transformation of wave length is located at the radiator and the reflector Between.
3. light fixture according to claim 1, wherein, the reflector includes parabolical reflecting surface.
4. light fixture according to claim 1, wherein, the reflector is spaced apart with the material for transformation of wave length.
5. light fixture according to claim 1, wherein, the radiator includes a series of fin.
6. light fixture according to claim 1, in addition to optical element, the optical element away from the light source and with institute It is not parallel to state radiator.
7. light fixture according to claim 6, wherein, the optical element includes being used to be structurally joining together the radiator With the breach of the optical element.
8. a kind of light fixture, including：
Optical element, the optical element are made up of light transmissive material and have first surface, second surface and the 3rd surface, its In, the first surface, the second surface and the 3rd surface are non-coplanar each other, the second surface and the 3rd table Face is not parallel each other；
Light source, the light source are disposed in close to the first surface but away from the second surface and the 3rd surface Position；And
Material for transformation of wave length, the material for transformation of wave length are formed on the second surface and the 3rd surface without covering the One surface.
9. light fixture according to claim 8, in addition to reflector, the reflector is configured to and the second surface phase Than the closer first surface.
10. light fixture according to claim 8, wherein, the second surface intersects with the 3rd surface.
CN201710404000.1A 2010-03-11 2011-03-11 Light fixture based on scattered photon extraction Pending CN107477471A (en)

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US8646927B2 (en) 2014-02-11
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CN105351792B (en) 2019-08-23
US20170356603A1 (en) 2017-12-14

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Application publication date: 20171215